Calculate the Arc Length of the Indicated Portion of the Curve

question 138

Multiple Choice

Calculate the arc length of the indicated portion of the curve r(t) .
- $$\mathbf { r } ( t ) = ( 4 - 6 t ) \mathbf { i } + ( 9 + 9 t ) \mathbf { j } + ( 2 t - 2 ) \mathbf { k } , - 10 \leq t \leq 1$$

• A) -1089
• B) -99
• C) 121
• D) 1331

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